scripts: document that all are LGPLv2
scripts: document that all are LGPLv2

I'm using LGPL rather than GPL as I would like
to encourage incorporating parts of these
scripts in various projects, while also
benefitting from any improvements therein

knoxxs/ps_mem,gdm/ps_mem,mitchty/ps_mem,shekkbuilder/ps_mem,nubark/ps_mem,pixelb/ps_mem